Need help with Salesforce Functions

I am a Salesforce Developer myself, and am looking for someone familiar with Salesforce Functions to help me invoke and deploy a Java-based function I already have to my sandbox.

https://developer.salesforce.com/docs/platform/functions/guide/develop.html

Again:

1. By "Salesforce Functions", I do NOT mean methods written in Apex. "Salesforce Functions" is a relatively new feature that allows code written in Java, JavaScript or TypeScript to be invoked from Apex. Basically an elastic computing offering that works without any governor limits within Salesforce ecosystem.

2. I already have Java code written and ready to go. I simply want to invoke my logic locally first and then eventually deploy to my sandbox so I can call it via Apex using functions.FunctionInvocation invoke()

Please do NOT apply if you are unfamiliar with Salesforce Functions.